| Alcobaca to Opwijk | 1,012.53 mi (1,629.51 km) |
| Alcobaca to Ostend | 989.15 mi (1,591.89 km) |
| Alcobaca to Oud-Heverlee | 1,020.80 mi (1,642.82 km) |
| Alcobaca to Oud-Turnhout | 1,054.08 mi (1,696.38 km) |
| Alcobaca to Oudenaarde | 989.22 mi (1,592.00 km) |
| Alcobaca to Oudenburg | 989.16 mi (1,591.90 km) |
| Alcobaca to Oupeye | 1,046.02 mi (1,683.41 km) |
| Alcobaca to Overijse | 1,014.23 mi (1,632.25 km) |
| Alcobaca to Overpelt | 1,062.64 mi (1,710.16 km) |
| Alcobaca to Paal | 1,046.52 mi (1,684.21 km) |
| Alcobaca to Peer | 1,059.81 mi (1,705.59 km) |
| Alcobaca to Pepinster | 1,045.25 mi (1,682.17 km) |
| Alcobaca to Peruwelz | 971.93 mi (1,564.17 km) |
| Alcobaca to Perwez | 1,015.42 mi (1,634.16 km) |
| Alcobaca to Philippeville | 986.83 mi (1,588.15 km) |
